The experiences on reproductive management of native specie such as Petenia splendida (Tenhuayaca) in the last four years in Tabasco, Mexico has generated enough information to allow the development of a technological package for supporting sustainable rural production, particularly in areas where most of the population belongs to ethnical groups....
Assuming externalities from aquaculture to fisheries, we use a Verhulst-Schaefer model of fish
population-dynamics and production, coupled with an aquaculture production model, to investigate
effects on open-access and rent-maximising fisheries. Externalities are modelled by letting carrying
capacity, intrinsic growth rate or catchability coefficient in the fishery depend on aquaculture production....
The direct economic values of aquatic resources used in various livelihood activities by
households in selected rural villages of Cambodia were estimated using the net economic value
approach. Data utilized were from 540 aquatic resources dependent households from 3 provinces
gathered using household survey, longitudinal monitoring and participatory rural appraisal...
There is much talk on recycling organic effluents, closing nutrient cycles, maximising energetic efficiency, and maintaining
equilibriums between humans and nature, etc., even for lakes and estuaries. Aquatic systems provide us (humans)
the service of recycling decomposable organics and deliver fish at the same time, notably, as long as the...
The Ratio Mountain Quadrangle is located in Southwest Montana, East of the city of
Butte. This quadrangle features two major geologic units; the Elkhorn Mountain
Volcanics, a series of several ignimbrites of varying composition, and the Boulder
Batholith, a large granite pluton that rose through the EMV. Previous studies in...
The result of changes in regulation or monitoring and enforcement of commercial fisheries are highly dependent on fishers’ supply response decisions. One central determinant of fishers’ reactions to such changes is their risk preferences. Empirical studies of fishers’ preferences have found that most fishers are risk averse. In this paper,...
In the past, Java island was known as “Java-dwipa”(a place where over-whelmed with food stock). However, due to over population, then food security became fragile including in fisheries sector. The such situation is worsen by economic and political turbulency in Indonesia.This study aimed to explore the level of fishers’s powerment...
This research analyzes the effects of unauthorized immigration on unemployment levels in the states of Texas and California in the United States. Data from the Department of Homeland Security is utilized to best estimate the size of unauthorized populations. This research finds that a one person increase in the unauthorized...
The animal protein intake in Nigeria is grossly insufficient yet the retail price of fish is rising. Market intermediaries, alleged to charge excessive and unjustifiable marketing margins (MM), are often blamed for this. This study examines this allegation using data from 225 sun-dried fish traders classified into three groups. Data...
The main purpose of this study is to answer a question, "Are the Japanese Fisheries Responsible?" The author tries to find the answer by analyzing a historical trend of the Japanese fisheries policies, recent legislation such as "Fisheries Basic Law" and "Sustainable Aquaculture Production Assurance Law", and example cases of...
Vietnam fisheries industry is expanding in scale and increasing its position in the national economy. It supplies not only a basic food commodity, but also the input for other industries, source of nutrition, employment, income, and foreign exchange earnings. The importance of fisheries, hence, emanates from its contribution to the...
In many salt-water recreational settings an imprecise measure of site choice is often collected based upon the individual's launch-point. For anglers who continue on from the launch-point in a boat, this imprecise measure of site choice is likely missing important on-water trade-offs thereby affecting the accuracy of recreational benefit measures...
Forest management in the Little Red River/Tall Cree traditionally used territory has long been dictated by
‘professionally’ trained foresters whose interests often run counter to those of aboriginal community residents. Because of
this, band members have largely been excluded from the decision making process while their concerns, values, and
knowledge...
The use of artificial reefs in the creation of commercial and recreational fisheries has received growing attention in recent years, and artificial reef development programs are now being undertaken by a number of countries worldwide. Despite a substantial volume of scientific information on the technical and biological aspects of artificial...
There has been significant growth in the catches of bluefin tuna in the Atlantic Ocean and especially in the
Mediterranean Sea for the last decade due to the expansion of fattening farms which export their production to
Japan. There has been an increase in catches due to strong demand and,...
El Archipielago de Colon, more commonly known as the Galapagos Islands, is a province of Ecuador located about 600 miles off the coast of South America. It consists of approximately 45 volcanic islands (15 major and 30 minor) plus scores of smaller islets and rocks. The total land area is...
Indicators of the economic performance of fishing vessels are frequently computed in many countries. Usually, measures of economic performance are based on the return on capital invested. However, several measures of capital value exist, according to the economic information available. In this paper, we use different types of information to...
In this paper, we examine the sustainability of fisheries system in Yoron Island, Kagoshima Prefecture, Japan using participatory flag modeling approach. The main purpose of flag model is to analyze whether one or more policy alternatives can be classified as acceptable or not in the light of an a priori...
The paper presents a spreadsheet based benefit-cost framework for assessing the net benefits of domestic
tuna processing to the resource-owning nation. The framework has a number of advantages including
transparency, flexibility, and a check on internal consistency. The case study examines the effects of a
range of tax, access fee...
Shrimp farming in Iran is one of the fast growing segments of the economy. In 1994, around 1%
of Iranian shrimp production was farmed and by 2003 the share of shrimp farming increased to
60%. In spite of the fact that shrimp culture had relatively rapid growth in last decade,...
This paper studies the consequences of creating a marine protected area (MPA) on a recreational non-extractive use of the ecosystem (scuba diving), and draws a parallel with the impact of MPAs on
commercial fishing. The first part of the paper presents some preliminary results of a field survey of scuba...
Coral reef ecosystems provide many important services to society. Their importance is not only proved by their beauty but also because they provide food and livelihood for millions of people in communities around the world, especially in developing countries. This paper estimates the economic value of coral ecosystems and potential...
An economic assessment of the commercial harvesting sector, seafood processing and distribution
sectors, charter boats for hire, livebait boats and dealer houses, marinas, support facilities, and
recreational boats was undertaken in Mississippi to determine the level of damage sustained as a
result of Hurricane Katrina. The devastation by this hurricane...
During 1986-2006, fisheries in Tonkin Gulf had made rapid development. Total engine power increased 11.6 times while total catch only increased 2.9 times. Big increase in number of fishing boats has resulted to the overexploitation in near shore waters since 1995 and this situation has been spread out all over...
Tuna fisheries around the world are governed by Regional Fishery Management Organizations (RFMOs), whose membership includes both harvesting nations and nations in whose waters the targeted fish populations reside. The outcomes of the policies established by an RFMO will depend on subsequent interactions among the fleets, the fishing sites and...
The gradient of a velocity vector field is an asymmetric tensor field which can provide critical insight into the vector field that is difficult to infer from traditional trajectory-based vector field visualization techniques. We describe the structures in the eigenvalue and eigenvector fields of the gradient tensor and how these...
Asymmetric tensor fields present new challenges for visualization techniques such as hyperstreamline placement and glyph packing. This is because the physical behaviors of the tensors are fundamentally different inside real domains where eigenvalues are real and complex domains where eigenvalues are complex. We present a hybrid visualization approach in which...
A recent study in agricultural products has brought out evidence of asymmetrical transmission of price changes according to the sign (positive or negative) of past variation. Interestingly, asymmetry was more commonplace for products with a lower elasticity of supply due to the perishable nature of products. A similar study based...
Atlantic salmon aquaculture is a growing industry in the Bay of Fundy on Canada’s Atlantic coast. The vast majority of aquaculture sites are concentrated in a relatively small coastal region of the province of New Brunswick (NB) where the industry is viewed as a major component of regional economic development....
New Zealand marine recreational fisher’s attitudes to their fisheries and fisheries management are discussed in the light of the findings from two studies. The first study, a national telephone survey of more than 600 fishers, investigated why fishers seek to go recreational fishing and their attitudes towards the fisheries management....
When several new species are introduced into the New Zealand Quota Management System in the near future, some of the quota, or single-year annual catch entitlement (ACE), will be tendered through competitive auctions rather than allocated based on historical catch. This study uses a laboratory experiment calibrated to a representative...
The potential of the developing zebrafish model for toxicology and drug discovery is limited by inefficient approaches to manipulating and chemically exposing zebrafish embryos—namely, manual placement of embryos into 96- or 384-well plates and exposure of embryos while still in the chorion, a barrier of poorly characterized permeability enclosing the...
Since 1999, the scallop fisheries have been granted access to closed areas on Georges Bank, and the
access programs have been managed through individual vessel quotas for scallops, and a common-pool
total allowable catch (TAC) for yellowtail flounder bycatch. The scallop resource is neither overfished
and nor is overfishing occurring,...
The open access nature of fisheries resources had caused application of excessive fishing effort to most World fisheries. Proper
management of fisheries resources is vital for sustainability and its safe future utilisation. Most attempts to salvage fisheries resources
had so far succeeded but have also created one or more problems....
In multispecies fisheries managed with individual fishery quotas (IFQs), fishers targeting certain species often have
insufficient quota to cover other jointly caught species. New Zealand employs a unique dual price-quantity system to
address this problem. In lieu of acquiring quota, fishers can opt to pay a fee per unit of...
Pla Tubtim (Oreochromis sp.) was a new fish species for aquaculture in Thailand. It was an improved breeding from tilapia and expected to be a common fish dish for the Thais while being an important source of income earning for fish farmers in this country. Logit model was applied to...
Fishery barometer surveys economic prospects and trends of fishery enterprises in Finland. The enterprises are divided into fishing, aquaculture, processing and the wholesale or retail trade. Since year 2000 the enterprises have been asked to evaluate their economic parameters, such as financial standing, turnover and investments. The present situation is...
The CHARM Project is a 5-years project (2002-2007) of the Royal Thai Government supported by the European Union. Its focus on developing coastal habitats and resources co-management processes is based on the assumption that the most important aspect of inefficient use of coastal resources lies at the institutional level. Among...
Enhancement of British-Columbia-to-Alaska Transboundary Rivers is a vast potential prize to all concerned. However, despite funding commitments in the Pacific Salmon Treaty, that program is at great risk of always being more potential than real. The cooperation needed to make this program work has been and continues to be grievously...
Manual beach seining is a widespread and popular fishing gear in Mozambique, targeting small pelagics and demersals and supplying exclusively national markets. The fishery provides employment for half of all marine artisanal fishermen in the country, and lands a significant proportion of total catch from the artisanal sector. The fishery...